"Candy Crush Saga accounting for 78% of our total gross bookings (across the web and mobile channels in the aggregate) or 86% and 58% of our mobile channel and web channel gross bookings, respectively," King said in the S-1.

But the craziest Candy Crush stat is this:

In 2011, before Candy Crush launched, King only generated $64 million. Last year, when Candy Crush exploded, the company generated $1.88 billion.

If Candy Crush is generating 78% of King's revenue, that means the game pulled in about $1.46 billion last year. Although it's worth noting that the game didn't become a true sensation until half way through 2013.

There is a troubling stat in the S-1: Candy Crush's revenue decreased between last year's third and fourth quarters, which means the fad could be dying down.